Installation of drivers for Windows8 requires that the original Driver certificate is used.
This is only possible if the USB port on your Vetronic unit has the default VID/PID values.
For products purchased after March 2015 this will be the case. For products before that, 
installation of the Windows 8 drivers will only be possible if the USB port on your piece of
equipment is re-programmed. This may require a return of your unit to Vetronic Services. 
Please contact us on 0044 (0)1626 365505. 
Use the latest version of the drivers as possible, currently Ver 2.12.06 